You asked, begged, and relentlessly pleaded for a Lexi episode — and Euphoria certainly delivered. The curtains rise for her much-hyped play, and “The Theater and It’s Double” cuts between the stage and her backstory. Lexi is, as we come to learn, the Bad Art Friend: Inspired by her childhood on the sidelines, her play about a fractured group of friends is an autobiographical patchwork of perfectly recreated memories, observations, and dream sequences that strike a nerve with just about everyone….